lib/lwip: Update lwIP to STABLE-2_2_1_RELEASE.

dpgeorge · dpgeorge · commit 076e07197e35 · 2025-04-24T23:01:16.000+10:00
This updates lwIP from STABLE-2_2_0_RELEASE, which was released in
September 2023.  The latest STABLE-2_2_1_RELEASE was released in February
2025.

Signed-off-by: Damien George &lt;damien@micropython.org&gt;
diff --git a/lib/lwip b/lib/lwip
@@ -1 +1 @@
-Subproject commit 0a0452b2c39bdd91e252aef045c115f88f6ca773
+Subproject commit 77dcd25a72509eb83f72b033d219b1d40cd8eb95
